As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: RAMPERS REPORT THE FIRST OFFICER SLIDING WINDOW FELL OFF ITS TRACKS DURING REPOSITION BACK TO GATE FROM PAD. RE-ENGAGED FIRST OFFICER SLIDING WINDOW INTO ITS TRACKS. PER AMM 56-12-11, OPERATIONAL CHECKS GOOD. PERFORMED CABIN PRESSURE LEAK TEST; PER AMM 05-51-91, TEST PASSED.